83947 has 4 divisors (see below), whose sum is σ = 84736. Its totient is φ = 83160.

The previous prime is 83939. The next prime is 83969. The reversal of 83947 is 74938.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 83947 - 2³ = 83939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204 + ... + 457.

It is an arithmetic number, because the mean of its divisors is an integer number (21184).

2⁸³⁹⁴⁷ is an apocalyptic number.

83947 is a deficient number, since it is larger than the sum of its proper divisors (789).

83947 is a wasteful number, since it uses less digits than its factorization.

83947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788.

The product of its digits is 6048, while the sum is 31.

The square root of 83947 is about 289.7360868100. The cubic root of 83947 is about 43.7859785676.

Subtracting from 83947 its reverse (74938), we obtain a palindrome (9009).

The spelling of 83947 in words is "eighty-three thousand, nine hundred forty-seven".